<template>
  <div class="swiper-container" ref="cur">
    <div class="swiper-wrapper">
      <div class="swiper-slide" v-for="(slide,index) in skuImageList" :key="slide.id">
        <img :src="slide.imgUrl" :class="{active:currentIndex==index}" @click="changeCurrentIndex(index)">
      </div>
    </div>
    <div class="swiper-button-next"></div>
    <div class="swiper-button-prev"></div>
  </div>
</template>

<script>

  import Swiper from 'swiper'
  export default {
    name: "ImageList",
	data(){
		return{
			currentIndex:0
		}
	},
	props:['skuImageList'],
	watch:{
		skuImageList(newValue,oldValue){
			this.$nextTick(()=>{
				new Swiper (this.$refs.cur, {
				    // 如果需要前进后退按钮
				    navigation: {
				      nextEl: '.swiper-button-next',
				      prevEl: '.swiper-button-prev',
				    },
					// 显示几个图片
					slidesPerView:3, 
					// 每一次切换图片个数
					slidesPerGroup:1,
				  })
			})
		}
	},
	methods:{
		changeCurrentIndex(index){
			// 修改响应式数据
			this.currentIndex = index;
			// 通知兄弟组件,当前的索引值为几
			this.$bus.$emit('getIndex',this.currentIndex);
      
		}
	}
  }
</script>

<style lang="less" scoped>
  .swiper-container {
    height: 56px;
    width: 412px;
    box-sizing: border-box;
    padding: 0 12px;

    .swiper-slide {
      width: 56px;
      height: 56px;

      img {
        width: 100%;
        height: 100%;
        border: 1px solid #ccc;
        padding: 2px;
        width: 50px;
        height: 50px;
        display: block;

        &.active {
          border: 2px solid #f60;
          padding: 1px;
        }

      }
    }

    .swiper-button-next {
      left: auto;
      right: 0;
    }

    .swiper-button-prev {
      left: 0;
      right: auto;
    }

    .swiper-button-next,
    .swiper-button-prev {
      box-sizing: border-box;
      width: 12px;
      height: 56px;
      background: rgb(235, 235, 235);
      border: 1px solid rgb(204, 204, 204);
      top: 0;
      margin-top: 0;
      &::after {
        font-size: 12px;
      }
    }
  }
</style>